2.5:
1. Media control for versions 33+, for book and articles reading including page numbers and prev/next buttons
2. Update new user welcome message and color scheme
3. Optimize disk access for performance
2.5.4:
1. [PRODUCTIVE-519] If a page fails during book reading, skip it and continue to the next page.
2. [PRODUCTIVE-521] release audio focus and media lock on book pause from Media Control
3. pre-fetch language models for translation when LIYL menu is constructed